Document byline viewlet is now displayed only to anonymous users

If permited by the Allow anyone to view 'about' information option in the Security Settings of Site Setup.

Refs: plone/Products.CMFPlone#1556

CHANGES.rst

@@ -6,7 +6,7 @@ Changelog
 
 Incompatibilities:
 
-- Deprecated ``plone.app.layout.globals.pattern_settings``. 
+- Deprecated ``plone.app.layout.globals.pattern_settings``.
   Moved view to ``Products.CMFPlone.patterns.view``.
   Deprecated also pointless interface for this view.
   Addresses https://github.com/plone/Products.CMFPlone/issues/1513 and goes together with https://github.com/plone/Products.CMFPlone/issues/1514.
@@ -18,6 +18,9 @@ New:
 
 Fixes:
 
+- Document byline viewlet is now displayed only to anonymous users if permited by the `Allow anyone to view 'about' information` option in the `Security Settings` of `Site Setup` (closes `CMFPlone#1556`_).
+  [hvelarde]
+
 - Fix body class ``pat-markspeciallinks`` not set.
   Fixes #84.
   [thet]
@@ -1708,3 +1711,4 @@ Fixes:
 .. _`CMFPlone#1037`: https://github.com/plone/Products.CMFPlone/issues/1037
 .. _`CMFPlone#1151`: https://github.com/plone/Products.CMFPlone/issues/1151
 .. _`CMFPlone#1178`: https://github.com/plone/Products.CMFPlone/issues/1178
+.. _`CMFPlone#1556`: https://github.com/plone/Products.CMFPlone/issues/1556

plone/app/layout/viewlets/content.py

@@ -71,7 +71,7 @@ def show(self):
             ISecuritySchema,
             prefix='plone',
         )
-        return not self.anonymous or settings.allow_anon_views_about
+        return self.anonymous and settings.allow_anon_views_about
 
     def show_history(self):
         has_access_preview_versions_permission = _checkPermission(